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plugins/mod_http_openmetrics.lua @ 11942:b4f77a7bf8ab
mod_http_openmetrics: Serve HTTP from global context
Makes GET /metrics work regardless of the value of the Host header.
This was not possible before 220468f7a103 which added the ability to
have global HTTP modules, which was partly why the per-host part was
kept while the module lived among the community modules.
Another reason was to provide some semblance of security by obscurity by
only loading the module on e.g. a 'localhost' VirtualHost or Component.
The new IP limits obsoletes this.
author | Kim Alvefur <zash@zash.se> |
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date | Thu, 25 Nov 2021 16:57:01 +0100 |
parent | 11929:85d51bfcf56b |
child | 12977:74b9e05af71e |
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-- Export statistics in OpenMetrics format -- -- Copyright (C) 2014 Daurnimator -- Copyright (C) 2018 Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> -- Copyright (C) 2021 Jonas Schäfer <jonas@zombofant.net> -- -- This module is MIT/X11 licensed. module:set_global(); local statsman = require "core.statsmanager"; local ip = require "util.ip"; local get_metric_registry = statsman.get_metric_registry; local collect = statsman.collect; local get_metrics; local permitted_ips = module:get_option_set("openmetrics_allow_ips", { "::1", "127.0.0.1" }); local permitted_cidr = module:get_option_string("openmetrics_allow_cidr"); local function is_permitted(request) local ip_raw = request.ip; if permitted_ips:contains(ip_raw) or (permitted_cidr and ip.match(ip.new_ip(ip_raw), ip.parse_cidr(permitted_cidr))) then return true; end return false; end function get_metrics(event) if not is_permitted(event.request) then return 403; -- Forbidden end local response = event.response; response.headers.content_type = "application/openmetrics-text; version=0.0.4"; if collect then -- Ensure to get up-to-date samples when running in manual mode collect() end local registry = get_metric_registry() if registry == nil then response.headers.content_type = "text/plain; charset=utf-8" response.status_code = 404 return "No statistics provider configured\n" end return registry:render(); end module:depends "http"; module:provides("http", { default_path = "metrics"; route = { GET = get_metrics; }; });